X Y Calibration Bars
thingiverse
These calibration bars are identical to the ones I use on my industrial sla machines to calibrate scale factors, which might be useful for testing the accuracy of 3d printing. Simply build and measure to see how close your machine is. They could also be used to calibrate the steps on the motors. There are three bars in each axis. Dimensions include: 5x5x50mm 5x5x100mm 5x5x200mm I've also added the axis X or Y with an arrow showing positive direction, so when removed from the bed you can still identify them.
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